code: def get_coordinator_address(cls) -> str:
      # Pick port in ephemeral range [(65535 - 2^12 + 1), 65535]
      port = int(os.environ[_JOBID_PARAM]) % 2**12 + (
          65535 - 2**12 + 1
      )
  
      # Parse the first hostname of the job
      # If we are looking for 'node001',
      # node_list potential formats are 'node001', 'node001,host2',
      # 'node[001-0015],host2', and 'node[001,007-015],host2'.
      node_list = os.environ[_NODE_LIST]
      delims = {",", "["}
      ind = next(
          (i for i, ch in enumerate(node_list) if ch in delims),
          len(node_list),
      )
      if (
          ind == len(node_list) or node_list[ind] == ","
      ):  # Formats: 'node001' or 'node001,host2'
          return f"{node_list[:ind]}:{port}"
      else:  # Formats: 'node[001-0015],host2' or 'node[001,007-015],host2'
          prefix = node_list[:ind]
          suffix = node_list[ind + 1 :]
          delims2 = {",", "-"}
          ind2 = next(
              (i for i, ch in enumerate(suffix) if ch in delims2), None
          )
          return f"{prefix}{suffix[:ind2]}:{port}"
  
file_path: jax/jax/_src/clusters/slurm_cluster.py
imports: from __future__ import annotations
  import os
  from jax._src import clusters
label_desc: Use image node_id 2 for calling the SlurmCluster obj's underlying member method code with example usage: obj.get_coordinator_address(cls) and returns: node_list, str, port, prefix, suffix, str, port